What is Docker Swarm Mode? A swarm is a cluster of Docker engines, or nodes, where you deploy services. What is a node? A node is an instance of the Docker engine participating in the swarm. You can also think of this as a Docker node. You can run one or more nodes on a single physical computer or cloud server, but production swarm deployments typically include Docker nodes distributed across multiple physical and cloud machines. Read more

Docker on my Raspberry PI Cluster Installation See here https://docs.docker.com/engine/installation/linux/debian/ Purge any older repositories (not necessary with a clean, new debian installation) $ apt-get purge "lxc-docker*" $ apt-get purge "docker.io*" Update package information, ensure that APT works with the https method, and that CA certificates are installed. $ apt-get update $ apt-get install apt-transport-https ca-certificates gnupg2 Add the new GPG key. $ sudo apt-key adv \ --keyserver hkp://ha.pool.sks-keyservers.net:80 \ --recv-keys 58118E89F3A912897C070ADBF76221572C52609D Edit /etc/apt/sources. Read more

Masternode # sudo apt-get install ganglia-monitor ganglia-webfrontend # sudo cp /etc/ganglia-webfrontend/apache.conf /etc/apache2/sites-enabled/ganglia.conf Configuration Masternode # sudo vi /etc/ganglia/gmetad.conf Change data_source data_source "CluPi" 60 localhost # sudo vi /etc/ganglia/gmond.conf [...] cluster { name = "CluPi" ## use the name from gmetad.conf owner = "unspecified" latlong = "unspecified" url = "unspecified" } [...] udp_send_channel { #mcast_join = 239.2.11.71 host = 192.168.1.161 port = 8649 ttl = 1 } udp_recv_channel { #mcast_join = 239. Read more